Abstract
BACKGROUND: Succinylcholine is the most used short-acting depolarizing muscle relaxant for rapid sequence induction. However, its use is associated with adverse effects, like fasciculations and myalgia. Thus, many pretreatment modalities were used to minimize or prevent these adverse effects. Our aim for this study was to compare the efficacy of propofol and thiopentone in preventing succinylcholine-induced fasciculation and myalgia in gabapentin-premedicated patients. Methods: Eighty patients with American Society of Anesthesiologists (ASA) physical status I/II, either male or female, in the aged group of 18-60 years, and scheduled to undergo elective abdominal surgery under general anesthesia were randomly allocated into either the propofol (P) or thiopentone (T) group. Anesthesia was induced with IV fentanyl 2 µg/kg, IV succinylcholine 2 mg/kg, and either IV propofol (2 mg/kg) in group P or IV thiopentone (5 mg/kg) in group T. In both groups, oral gabapentin 600 mg was given two hours before the surgery. All patients were observed and graded for intraoperative fasciculations and myalgia during 24 postoperative hours by a blinded observer. Fasciculation grade, myalgia grade, total tramadol consumption, and demographic data were compared using a test of proportion and chi-squared test. RESULTS: Study results demonstrated that the use of propofol significantly decreases the severity of fasciculation at one, two, and three minutes (P < 0.001) and myalgia at two, six, and 12 hours (P < 0.001) more than thiopentone in gabapentin-premedicated patients. Tramadol consumption in both groups was insignificant (P = 0.658). CONCLUSIONS: Propofol (2 mg/kg) is more effective than thiopentone (5 mg/kg) in decreasing the severity of fasciculation and myalgia following succinylcholine administration in gabapentin-premedicated patients.